package com.heima.utils.common;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class DateUtils{
	public static String DATE_FORMAT = "yyyy-MM-dd";
	
	public static String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
	
	public static final String DATE_TIME_STAMP_FORMATE = "yyyyMMddHHmmss";
	
	// 2019年07月09日
	public static String DATE_FORMAT_CHINESE = "yyyy年M月d日";
	// 2019年07月09日 14:00:32
	public static String DATE_TIME_FORMAT_CHINESE = "yyyy年M月d日 HH:mm:ss";
	
	
	/**
	 * 获取当前日期
	 *
	 * @return
	 */
	public static String getCurrentDate(){
		String datestr = null;
		SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);
		datestr = df.format(new Date());
		return datestr;
	}
	
	/**
	 * 获取当前日期时间
	 *
	 * @return
	 */
	public static String getCurrentDateTime(){
		String datestr = null;
		SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_TIME_FORMAT);
		datestr = df.format(new Date());
		return datestr;
	}
	
	/**
	 * 获取当前日期时间
	 *
	 * @return
	 */
	public static String getCurrentDateTime(String Dateformat){
		String datestr = null;
		SimpleDateFormat df = new SimpleDateFormat(Dateformat);
		datestr = df.format(new Date());
		return datestr;
	}
	
	public static String dateToDateTime(Date date){
		String datestr = null;
		SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_TIME_FORMAT);
		datestr = df.format(date);
		return datestr;
	}
	
	/**
	 * 将字符串日期转换为日期格式
	 *
	 * @param datestr
	 * @return
	 */
	public static Date stringToDate(String datestr){
		
		if(datestr == null || datestr.equals("")){
			return null;
		}
		Date date = new Date();
		SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);
		try{
			date = df.parse(datestr);
		}catch(ParseException e){
			date = DateUtils.stringToDate(datestr, "yyyyMMdd");
		}
		return date;
	}
	
	/**
	 * 将字符串日期转换为日期格式
	 * 自定義格式
	 *
	 * @param datestr
	 * @return
	 */
	public static Date stringToDate(String datestr, String dateformat){
		Date date = new Date();
		SimpleDateFormat df = new SimpleDateFormat(dateformat);
		try{
			date = df.parse(datestr);
		}catch(ParseException e){
			e.printStackTrace();
		}
		return date;
	}
	
	
	/**
	 * 将日期格式日期转换为字符串格式
	 *
	 * @param date
	 * @return
	 */
	public static String dateToString(Date date){
		String datestr = null;
		SimpleDateFormat df = new SimpleDateFormat(DateUtils.DATE_FORMAT);
		datestr = df.format(date);
		return datestr;
	}
	
	/**
	 * 将日期格式日期转换为字符串格式 自定義格式
	 *
	 * @param date
	 * @param dateformat
	 * @return
	 */
	public static String dateToString(Date date, String dateformat){
		String datestr = null;
		SimpleDateFormat df = new SimpleDateFormat(dateformat);
		datestr = df.format(date);
		return datestr;
	}
	
	/**
	 * 获取日期的DAY值
	 *
	 * @param date 输入日期
	 * @return
	 */
	public static int getDayOfDate(Date date){
		int d = 0;
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		d = cd.get(Calendar.DAY_OF_MONTH);
		return d;
	}
	
	/**
	 * 获取日期的MONTH值
	 *
	 * @param date 输入日期
	 * @return
	 */
	public static int getMonthOfDate(Date date){
		int m = 0;
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		m = cd.get(Calendar.MONTH) + 1;
		return m;
	}
	
	/**
	 * 获取日期的YEAR值
	 *
	 * @param date 输入日期
	 * @return
	 */
	public static int getYearOfDate(Date date){
		int y = 0;
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		y = cd.get(Calendar.YEAR);
		return y;
	}
	
	/**
	 * 获取星期几
	 *
	 * @param date 输入日期
	 * @return
	 */
	public static int getWeekOfDate(Date date){
		int wd = 0;
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		wd = cd.get(Calendar.DAY_OF_WEEK) - 1;
		return wd;
	}
	
	/**
	 * 获取输入日期的当月第一天
	 *
	 * @param date 输入日期
	 * @return
	 */
	public static Date getFirstDayOfMonth(Date date){
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		cd.set(Calendar.DAY_OF_MONTH, 1);
		return cd.getTime();
	}
	
	/**
	 * 获得输入日期的当月最后一天
	 *
	 * @param date
	 */
	public static Date getLastDayOfMonth(Date date){
		return DateUtils.addDay(DateUtils.getFirstDayOfMonth(DateUtils.addMonth(date, 1)), -1);
	}
	
	/**
	 * 判断是否是闰年
	 *
	 * @param date 输入日期
	 * @return 是true 否false
	 */
	public static boolean isLeapYEAR(Date date){
		
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		int year = cd.get(Calendar.YEAR);
		
		if(year % 4 == 0 && year % 100 != 0 | year % 400 == 0){
			return true;
		}else{
			return false;
		}
	}
	
	/**
	 * 根据整型数表示的年月日，生成日期类型格式
	 *
	 * @param year  年
	 * @param month 月
	 * @param day   日
	 * @return
	 */
	public static Date getDateByYMD(int year, int month, int day){
		Calendar cd = Calendar.getInstance();
		cd.set(year, month - 1, day);
		return cd.getTime();
	}
	
	/**
	 * 获取年周期对应日
	 *
	 * @param date  输入日期
	 * @param iyear 年数  負數表示之前
	 * @return
	 */
	public static Date getYearCycleOfDate(Date date, int iyear){
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		
		cd.add(Calendar.YEAR, iyear);
		
		return cd.getTime();
	}
	
	/**
	 * 获取月周期对应日
	 *
	 * @param date 输入日期
	 * @param i
	 * @return
	 */
	public static Date getMonthCycleOfDate(Date date, int i){
		Calendar cd = Calendar.getInstance();
		cd.setTime(date);
		
		cd.add(Calendar.MONTH, i);
		
		return cd.getTime();
	}
	
	/**
	 * 计算 fromDate 到 toDate 相差多少年
	 *
	 * @param fromDate
	 * @param toDate
	 * @return 年数
	 */
	public static int getYearByMinusDate(Date fromDate, Date toDate){
		Calendar df = Calendar.getInstance();
		df.setTime(fromDate);
		
		Calendar dt = Calendar.getInstance();
		dt.setTime(toDate);
		
		return dt.get(Calendar.YEAR) - df.get(Calendar.YEAR);
	}
	
	/**
	 * 计算 fromDate 到 toDate 相差多少个月
	 *
	 * @param fromDate
	 * @param toDate
	 * @return 月数
	 */
	public static int getMonthByMinusDate(Date fromDate, Date toDate){
		Calendar df = Calendar.getInstance();
		df.setTime(fromDate);
		
		Calendar dt = Calendar.getInstance();
		dt.setTime(toDate);
		
		return dt.get(Calendar.YEAR) * 12 + dt.get(Calendar.MONTH) -
				(df.get(Calendar.YEAR) * 12 + df.get(Calendar.MONTH));
	}
	
	/**
	 * 计算 fromDate 到 toDate 相差多少天
	 *
	 * @param fromDate
	 * @param toDate
	 * @return 天数
	 */
	public static long getDayByMinusDate(Object fromDate, Object toDate){
		
		Date f = DateUtils.chgObject(fromDate);
		
		Date t = DateUtils.chgObject(toDate);
		
		long fd = f.getTime();
		long td = t.getTime();
		
		return (td - fd) / (24L * 60L * 60L * 1000L);
	}
	
	/**
	 * 计算年龄
	 *
	 * @param birthday 生日日期
	 * @param calcDate 要计算的日期点
	 * @return
	 */
	public static int calcAge(Date birthday, Date calcDate){
		
		int cYear = DateUtils.getYearOfDate(calcDate);
		int cMonth = DateUtils.getMonthOfDate(calcDate);
		int cDay = DateUtils.getDayOfDate(calcDate);
		int bYear = DateUtils.getYearOfDate(birthday);
		int bMonth = DateUtils.getMonthOfDate(birthday);
		int bDay = DateUtils.getDayOfDate(birthday);
		
		if(cMonth > bMonth || (cMonth == bMonth && cDay > bDay)){
			return cYear - bYear;
		}else{
			return cYear - 1 - bYear;
		}
	}
	
	/**
	 * 从身份证中获取出生日期
	 *
	 * @param idno 身份证号码
	 * @return
	 */
	public static String getBirthDayFromIDCard(String idno){
		Calendar cd = Calendar.getInstance();
		if(idno.length() == 15){
			cd.set(Calendar.YEAR, Integer.valueOf("19" + idno.substring(6, 8))
					.intValue());
			cd.set(Calendar.MONTH, Integer.valueOf(idno.substring(8, 10))
					.intValue() - 1);
			cd.set(Calendar.DAY_OF_MONTH,
					Integer.valueOf(idno.substring(10, 12)).intValue());
		}else if(idno.length() == 18){
			cd.set(Calendar.YEAR, Integer.valueOf(idno.substring(6, 10))
					.intValue());
			cd.set(Calendar.MONTH, Integer.valueOf(idno.substring(10, 12))
					.intValue() - 1);
			cd.set(Calendar.DAY_OF_MONTH,
					Integer.valueOf(idno.substring(12, 14)).intValue());
		}
		return DateUtils.dateToString(cd.getTime());
	}
	
	/**
	 * 在输入日期上增加（+）或减去（-）天数
	 *
	 * @param date 输入日期
	 * @param iday 要增加或减少的天数
	 */
	public static Date addDay(Date date, int iday){
		Calendar cd = Calendar.getInstance();
		
		cd.setTime(date);
		
		cd.add(Calendar.DAY_OF_MONTH, iday);
		
		return cd.getTime();
	}
	
	/**
	 * 在输入日期上增加（+）或减去（-）月份
	 *
	 * @param date   输入日期
	 * @param imonth 要增加或减少的月分数
	 */
	public static Date addMonth(Date date, int imonth){
		Calendar cd = Calendar.getInstance();
		
		cd.setTime(date);
		
		cd.add(Calendar.MONTH, imonth);
		
		return cd.getTime();
	}
	
	/**
	 * 在输入日期上增加（+）或减去（-）年份
	 *
	 * @param date  输入日期
	 * @param iyear 要增加或减少的年数
	 */
	public static Date addYear(Date date, int iyear){
		Calendar cd = Calendar.getInstance();
		
		cd.setTime(date);
		
		cd.add(Calendar.YEAR, iyear);
		
		return cd.getTime();
	}
	
	/**
	 * 將OBJECT類型轉換為Date
	 *
	 * @param date
	 * @return
	 */
	public static Date chgObject(Object date){
		
		if(date != null && date instanceof Date){
			return (Date) date;
		}
		
		if(date != null && date instanceof String){
			return DateUtils.stringToDate((String) date);
		}
		
		return null;
		
	}
	
	public static long getAgeByBirthday(String date){
		
		Date birthday = stringToDate(date, "yyyy-MM-dd");
		long sec = new Date().getTime() - birthday.getTime();
		
		long age = sec / (1000 * 60 * 60 * 24) / 365;
		
		return age;
	}
	
	
	/**
	 * @param args
	 */
	public static void main(String[] args){
		// String temp = DateUtil.dateToString(getLastDayOfMonth(new Date()),
		///   DateUtil.DATE_FORMAT_CHINESE);
		// String s=DateUtil.dateToString(DateUtil.addDay(DateUtil.addYear(new Date(),1),-1));
		
		
		long s = DateUtils.getDayByMinusDate("2012-01-01", "2012-12-31");
		System.err.println(s);
		
		
	}
}
